Share Repurchases (Detail) - Share Repurchase Program 2013 - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2016	Dec. 31, 2015
Share Repurchases [Line Items]
Shares of common stock repurchased	59	66	122	155
Value of common stock repurchased	$ 3,533	$ 3,600	$ 7,083	$ 7,600